PIC12F675 Solar controller with PMP

program adc_test;  {$PROCESSOR PIC12F675 } {$FREQUENCY 4 MHZ } {$OPTIMIZE MEMORY } {$CONFIG BODEN = OFF, MCLRE = OFF, OSC = INTRC_OSC_NOCLKOUT, WDT = OFF }  var   Volt: word;   tmp1: dword;   realvolt: word;    function ADC_read(channel: byte): word; var   Result_Lo: byte @Result + 0;   Result_Hi: byte @Result + 1; begin   ADCON0.CHS := Channel;   ADCON0.ADON := true;     { Ensure AD is activated }   delay(50);   ADCON0.GO := true;       { Start conversion }   while ADCON0.GO_DONE do;   Result_Lo := ADRESL;   Result_Hi := ADRESH; end;  // main program begin   //Initialization part   INTCON := 0b00000000;   IOC := 0;   T1CON := 0b00000001;   OPTION_REG := 0b10000001;   VRCON := 0; // vref OFF   CMCON := 0b00000111;   // comparators OFF   asm     BSF STATUS, RP0     CALL 0x3FF     MOVWF OSCCAL     ;BCF STATUS, RP0   end;   ANSEL := 0b01011000; // FOSC/16 and AN3 as analog   TRISIO := 0b00111000;   ADCON0.ADFM  := 1;  // 0 = left justified, 1 = right justified   ADCON0.VCFG  := 0;  // voltage ref is VDD   ADCON0.ADON  := 1;  // turn on ADC module   while true do begin     Volt := ADC_Read(3);     // Let's do the math for the real voltage value:     // (The resistive divider values are:     // R1 = 10K and R2 = 1K)     tmp1 := dword(537) * (Volt + 1);     realvolt := tmp1 div 1000;     if realvolt > 136 then //-- 13.6V       GPIO.GP1 := 0; //charging off     if realvolt < 130 then //-- 13.0V       GPIO.GP1 := 1; //charging on     if realvolt > 129 then //-- 12.9V       GPIO.GP2 := 0; // consumer on     if realvolt < 120 then //-- 12.0V       GPIO.GP2 := 1; // consumer off            //Wait for 2 seconds.  This way, your charging relay will     //not be afected if you have a defective battery (if your     //battery can't hold the charge and is discharging fast bellow     //the charged value, your relay will "flash" fast between     //"charge/don't charge" - with that delay, this will not happen)     delay_ms(1000);     delay_ms(1000);          {//test     gpio.gp1 := not gpio.gp1;     delay_ms(volt);}        end; // while end.